Coming across an issue in Azure DevOps Server (On-prem) 2019 Patch 1.1 where when 1 person creates a 'Deployment Group' under a project - no one else can register a target, as they see an alert stating: 'You do not have permissions to register targets. Contact your release manager to grant permissions.'
In this particular case I was explicitly made an administrator of the deployment group as a last ditch effort and I still see this message. I am a collection admin and have every right under the sun as far as I can tell under the main security tab under the collection.
What is the correct way to grant user permissions to avoid this alert and allow everyone to register targets for a deployment group in a project?
When you create a deployment group in a project, it will actually create a deployment pool at the organization level.
Org Level:
Project Level:
You likely need to configure the deploy pool security at the root level (so it inherits) since it is empty by default: